When an automatic transmission filter is the one part standing between clean fluid circulation and debris-related wear, getting the exact specification right is not optional. This filter is built specifically for shallow-pan units coded 4L40E, 5L40E, 5L50E, and ON10, covering applications from 1999 forward, and its defining features are the flat inlet design and the absence of an outlet neck spacer.Those two details are not minor footnotes. The flat inlet and the no-outlet-neck-spacer configuration are what separate this filter from visually similar units. Installing a filter with the wrong inlet geometry or an outlet neck spacer in a shallow-pan application can compromise fluid draw, create leaks at the valve body interface, and shorten the life of internal components. This unit matches the shallow-pan setup without requiring any adapter or spacer to fit correctly.This is a single filter. It does not include a pan gasket, a filter seal, solenoids, or any other hardware. If your service requires additional components, those need to be sourced separately. Confirm before ordering.At REMCO, operating in automatic transmission parts since 1991, each unit is picked and verified individually against its part record before it ships. The packaging includes the part identification so you can cross-check on arrival.To confirm this is the correct filter: verify the code on your transmission is one of the four listed (4L40E, 5L40E, 5L50E, ON10), confirm the unit uses the shallow pan configuration, and confirm the application calls for a flat inlet with no outlet neck spacer. Weight is 1 lb. Fits shallow-pan applications on 4L40E, 5L40E, 5L50E, and ON10 automatic transmission units built 1999 and later, covering a wide service range without modification. This listing is for the filter only. It does not include a pan gasket, solenoids, filter seal, or any additional hardware. Verify what your service requires before ordering. The flat inlet and absent outlet neck spacer define this filter precisely: installing the wrong inlet style in a shallow-pan unit causes poor fluid draw and accelerated wear, so the geometry here matters. One transmission filter, flat inlet, no outlet neck spacer, shallow-pan design. Packaged and verified individually. Weight: 1 lb. Before ordering, confirm the transmission code stamped on your unit is 4L40E, 5L40E, 5L50E, or ON10, and that your application uses the shallow pan with a flat inlet configuration.